The bright light emission spectrums below are seen through a spectroscope. the unknown sample is a mixture between f the observed gases. which gases are found in the unknown sample?

gases w and z

gases x when y

gases w and y

gases z and y

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped

Ais not a mixture. colloid compound suspension solution

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.